BMW's New Diesel Engine Has Four Friggin' Turbos | News | CarThrottle
In for an engine rebuild: my BMW M550d Touring. Factory specs: tri-turbo diesel, 0-60 mph in 4.6 s. My engine's additional spec: leaking cylinder head. : r/Justrolledintotheshop
BMW announces quad-turbo six cylinder engine
2018 BMW M550d Touring – Quad-Turbo Diesel Station Wagon